Micnova MQ-SFT270 16-Channel Wireless Studio Light Trigger and Receiver Kit for Canon EOS, Nikon, Pentax, Olympus and Panasonic DSLR Cameras (65-foot Range) Flash Sync Speed of up to 1/250 Sec Battery Requirements: 23AE 12V (Transmitter) 2x AAA (receiver) - Batteries not included Operating Range: 65-feet (20m) Indoor - Up to 100-feet (30m) outdoors 1/4" Monoplug Connector 1 Year Warranty